Computer Mediated Learning

There are many definitions available that attempt to explain learning processes delivered, enabled or mediated using electronic technology for the explicit purpose of learning. These definitions include such terms as distance learning which may occur even in the absence of electronic technology. Distance learning has for a long time been performed using correspondence (Fee, 2009).Advertising We will write a custom essay sample on Computer Mediated Learning specifically for you for only $16.05 $11/page Learn More An example of these terms is computer mediated learning which is used to define any learning process that is facilitated by electronic technology. Computer mediated learning therefore implies that the learning could be facilitated by both one way and two way learning exchanges as well as learner to learner exchanges. Among the terms that are often used and erroneously taken to have the same meaning as computer mediated learning is the term comput er authored learning. Computer authored learning defines a learning process that is designed or engineered through the use of computer technology (Distefano, Rudestam Silverman, 2004). This mode of learning involves the use of authoring tools which are computer programs. These programs are used to create powerful scripts that can create useful learning content. Prior to the emergence of the internet such tools were commonly used to ease the process of learning. In some reports it is stated that by 1993, there were over 165 authoring tools available for use by instructors (Distefano, Rudestam Silverman, 2004). However, with the emergence of the internet web authoring tools have fast replaced these tools. In fact many web page developers have taken to use the authoring to describe the process of web page creation (Distefano, Rudestam Silverman, 2004). One major advantage that is the result of the emergence of the World Wide Web is the ease with which content can be changed and upda ted. This appears to have been a major short coming of the early models of computer authored learning tools.  Other terms that have long been used interchangeably with computer mediated learning are computer based training and computer assisted instruction. These approaches have for long used embedded questions in an instructional module to determine paths for individual students (Ifenthaler Seel, 2010). One of the most common uses of this approach is in the testing of students located in various remote locations. The modern approach is to use the results from the tests to guide the provision of instruction based on student needs (Ifenthaler Seel, 2010).  As the discussion has indicated many of these different terms were used based on the needs of the vendor.Advertising Looking for essay on education? Let's see if we can help you! Get your first paper with 15% OFF Learn More The goal appeared to have been to place the vendor at the center stage. Based on these ma ny definitions there has been a need to come up with a single term that will provide a convenient umbrella for all these different activities. (Fee, 2009). Terms such as distance learning that emerged from learning institutions though authoritative are still quite diverse. It is for this reason that the term e-learning is fact becoming a more convenient umbrella term than any of the previously mentioned definitions. According to the American Society for Training and Development, â€Å"e-learning covers a wide set of applications such as web based learning, computer based learning, virtual classrooms and digital collaboration† (Fee, 2009). This definition appears suitable especially due to the fact that this is the world’s largest professional body for professional development and learning. The organizations membership is reported to be in the range of 70,000 and the body can be found in almost 100 countries across the globe (Fee, 2009). This large membership and global representation makes this body more suitable than most to define learning that involves the use of computers and digital technology. It is possible that as times goes by this term and the accompanying definition will replace the many confusing terms that have been used both in the past and today to describe the role and interaction between computer, students and instruction. References DiStefano, A., Rudestam. K. E., Silverman, R. J. (2004). Encyclopedia of Distributed Learning. Thousand Oaks, CA: Sage Publications Inc. Fee, K. (2009). Delivering E-Learning: A complete strategy for design, application and assessment. London: Kogan Page Limited. Ifenthaler, D., Seel, N. M. (2010). Computer-Based Diagnostics and Systematic Analysis of Knowledge. New York: Springer Science + Business Media LLC.Advertising We will write a custom essay sample on Computer Mediated Learning specifically for you for only $16.05 $11/page Learn More This essay on Computer Mediated Learning was written and submitted by user Thunderball to help you with your own studies. You are free to use it for research and reference purposes in order to write your own paper; however, you must cite it accordingly. You can donate your paper here.

Why do Teens Contemplate to Suicide essays

Why do Teens Contemplate to Suicide essays Why do Teens Contemplate to Suicide? As the third largest cause of death between the ages of 15 and 24, the adolescent suicide rate has tripled since 1960. This is the only age group in which an increase has occurred over the last three decades. While there are approximately 10,000 reported teen suicides annually, it is estimated that the number of teen suicides is actually three to four times that number when unreported deaths and suicide equivalents are added. The teenage years are a period of turmoil for just about everyone. Youre learning new social roles, developing new relationships, getting used to the changes in your body, and making decisions about your future. And when youre looking for answers to problems, it can seem like no one has them. That can make a person feel quite alone. Teenagers experience strong feelings, confusion, self-doubt, pressure to succeed, financial uncertainty, and other fears while growing up. Teenagers commit suicide because there is too much pain in their lives and they can do on e of the two things; move from the pain or learn to cope with the pain. While some teenagers learn to cope with the pain, others attempt suicide. Suicide among young people have increased nationwide in the recent years and it is important that everyone is aware of the major causes, symptoms, and methods of prevention of this self-inflicted death. To further understand suicide, one must take a look at the different reasons behind the act itself. Suicide is not a genetic disease, but rather a series of events that are very depressing or stressful. Without depression, most people would not attempt to take their own lives. Depression is a vital issue in almost every suicide attempt. The victim feels very depressed and everything seems to be going the wrong way. Depression is not just sadness. Depression is a mild form mental illness, which can be permanent or temporary. It can be...

Cross culture communication and negotiation Essay - 1

Cross culture communication and negotiation - Essay Example The author point out how both native and non-native speakers should make their approach in order to understand each other and co-construct the conversation in intercultural communication in an age when English is becoming a global language. 5. Dovidio, J.F., Hebl, M., Richeson, J.A. & Shelton, J.N. 2006. Nonverbal communication, Race, and intergroup Interaction. [Online] Available at: http://www.yale.edu/intergroup/Dovidio_Hebl_Richeson_Shelton_2006.pdf In this article, the authors analyses the importance of nonverbal communication in cross cultural communication and negotiation process. It says that members of majority and minority groups in general may differ in the types of nonverbal behaviors they display regularly. It also analyses Social Identity and Nonverbal Behavior in Intergroup Interaction. 6. Rudlin, P. 2008. Indirect communication: I see what you mean. MultiLingual, Jun2008, Vol. 19 Issue 4, p49-51, This article focuses on the importance of non-verbal communication in Ja pan. It says that Japanese prefer to use eye contact, teeth sucking and head movements to avoid confrontation and disagreement with others. Listeners and speakers are expected to understand the real meaning of their movement and vague expressions to convey that it is not necessary to talk about it. 7. Mandal, M.K., Harizuka, S., Bhushan, B. & Mishra, K.C. (2001). Cultural variation in hemifacial asymmetry of emotion expressions British Journal of Social Psychology (2 001), 40, 385–398 The authors of this article argues that emotions such as happy, sad, fear , anger, surprise, disgust etc are displayed differently by people of different cultures after analysing the emotions of Japanese, Oriental Indian and...All these developments result in increased cross cultural communication and business negotiation processes. Cross cultural communication and negotiation are vital in determining the success and failures of international business. Stuhlmacher & Citera (2005) pointed out that â€Å"Negotiations are often categorized as distributive (win-lose) and integrative (win-win)† (p.24). Even though everybody wants to conduct negotiations to yield a win-win result, in most of the cases, it results in win-lose results. Both the parties argue their points strongly while doing negotiations. Such arguments often end up in conflicts. The success of business negotiation rests in the abilities of the parties in solving such crisis. While doing international business, the negotiators belong to different cultures, and hence it is quite possible that the ideas conveyed by one by one person may not be perceived properly by the other person. It should be noted that verbal as well as nonverbal communication are important in communicating the ideas of one person to another. In cross cultural business negotiations, the negotiators are from different cultures and hence their verbal as well as the nonverbal means of communication could be entirely different.

Growing Assignment Example | Topics and Well Written Essays - 250 words

Growing - Assignment Example Balancing classroom activities and creating time for co-curricular is essential in reaffirming student’s academic performance. Social media interaction through Facebook, YouTube or LinkedIn, are critical to keeping learners updated on vital issues and trends in their fields of study. Digital technology plays an integral role in shaping today’s life. Technology has a great influence in nearly all the fields of life ranging including education. Introduction of distance learning allows people from all walks of live to access quality education regardless of their location. Digital technologies improve access to information, storage, and retrieval of documents through development of school websites and cloud computing. According to Higgins, Xiao & Katsipataki (2012), studies linking provision and use of technology to attainment indicate consistent positive association with education outcomes. Computers are essential in carrying out research, doing assignments and presentation as they provide the based updated information. Technology acts as a supplement to regular teaching hence should not be applicable as a replacement. In addition, tested attainment gains are evident in mathematics, science and in improving the learners writing intervention in literacy. In conclusion, being a user of the digital devices such as laptops and tablets, I regularly visit social media as a source of vital information and interaction with friends’ schedule in their daily program. Balancing of academic and other activities is my crucial tool in monitoring and limiting unproductive use of technologies. Higgins, S., Xiao, Z. & Katsipataki, M. (2012, November 26). The Impact of Digital Technology on Learning: A summary for the Education Endowment Foundation. Full Report. London: Durham University Education Endowment Foundation. Richtel, M. (2010, November 21). â€Å"Growing Up Digital, Wired for Distraction.† The New York Times.

Employability in Health and Social Care

Employability in Health and Social Care Introduction Employability refers to a person’s capacity for gaining and preserving employment. For individuals, employability depends on the knowledge, skills and abilities they possesses, in addition to the way they present those assets to employers Employability skills are in general needed to get most jobs specially in health and social care that can take employers to the top level. The report will outline a range of occupations within health and social care. The report will demonstrate research skills in researching careers; will also outline a typical hierarchy within health and social care. Finally the report will explain the importance of hierarchy in terms of the roles and responsabilities. (NHS 2014) Range of Occupations in Health and Social Care and Careers HealthCare is the diagnosis, treatment, and prevention of disease, illness, injury, and other physical and mental deficiencies in human beings, (Benbassart and Taragin, 1998). Social care in England is defined as the provision of social work, personal care, protection or social support services to children or adults in need or at risk, or adults with needs arising from illness, disability old age or poverty. Brotherton and Parker (2011).The health and social care Act (2012) sets out specific obligations for the health system and its relationship to work together. This act clearly states that it gives a duty to NHS, England, clinical commissioning groups and health and wellbeing boards to make it easier for health and social services to work together. Health can be provided in different settings example: Care homes patients homes, offices, clinics, hospitals community health centres and specialists hospitals (Smith, 2000). There are a variety of different occupations within the health and social care that gives opportunity to embrace career. Those entire careers have a code of practice and ethics, and they are accountable to themselves, to the patients and the actions they take. Healthcare professionals provides benefits and welfare service, they are: Doctors, nurses, occupational therapist, dietician, radiographers, speech and language therapist, prosthetics, paramedics, Social care workers are: Social worker, and nursing auxiliary, who works closely with people supporting them with their social lives outcomes. Demonstration Skills in Researching Careers Doctors and GP they are professional accountable for (HPC and GMC), (Doh 2009). Doctors observe, identify and provide treatment to patients who have been referred to the hospital by GPs and other health professionals. They apply medical knowledge and skills to the diagnosis, prevention and management of disease. Doctors they work in hospitals, outpatient clinics, public sector, (National Health Service), and the private sector. Treating patients, they refer them to a wide range of other healthcare professionals including nurses, radiographers, pharmacists and physiotherapists. They work also within a number of specialities examples: Anaesthetic, emergency medicine, general surgery, general medicine and gynaecology. (NHS 2014) Nurses and midwives are professionally accountable to the Nurse and Midwifery Council (NMC) and the Dental Nurse to General Dental Council (GDC). A dental nurse helps the dentist with clients in his care in all aspects; for example getting the appropriate tools ready, mixing materials and safeguarding patient wellbeing. Dental nurses also organises dentist notation for records and ensure the medical record is kept securely under Data Protection Act 1998. Dental nurse maintain the hygiene standards by cleaning the surgery and disinfects all the instruments (Health and Safety at Work Act 1974).In general practice, sometimes the dental nurse may help with reception work making appointments, taking payments, dealing with paperwork and meeting and reassuring patients. Dental nurses can work in general practice, hospitals or the community dental services and can also train as a dental nurse in the armed forces. (NHS 2014) Social workers support people with social aspects. Social work involves pleasing clients, families and friends. Social workers work closely with other organisations for example: the police, local authority (departments), schools and the probation service. Social workers specialise in adult or childrens services. They work with people with mental health problems or learning difficulties in residential care, working with offenders (supervising them in the community and assist them to find a job), supporting people with HIV/AIDS and older people at home helping with their health, housing or benefits. They also provide assistance and advice to children and young people to keep families together, working in childrens homes, managing adoption and foster care processes, providing support to younger people leaving care or who are at risk or in trouble with the lawand helping children who have problems at school or are facing difficulties derived by illness in the family. Social worker can wo rk in a range of organizations, local authorities, independent organizations, charities, NHSin hospitals, mental health trusts and other communities settings. A nursing auxiliary is a health care assistant that’s works alongside fully qualified healthcare practitioners, would assist with providing patient care, helping to look after their comfort and well-being. They can work in hospitals or community. There are supporting people in need. Nursing auxiliary there are involved in delivering programmes for the patient, in assisting with the client comfort levels. They can take temperatures, respirations, and others statistic like blood pressure, they maintain accurate and brief patient records, helping patient to move around, changing and clean dressings Typical Hierarchy within Health and Social Care A hierarchy is an organization structure in layers where each person has clear roles and responsabilities. The hierarchy of authority in health social care it is also important to sustain success. The hierarchy grows with the strength of a experienced managerial staff, and employers look to management to provide career progress. The structure offers key advantages, such as specific divisions of labour and clear lines of reporting and accountability, this means that authority, or power, is delegated downward in the organization, and that lower- levels individuals have less authority than higher-levels whose scope of responsibility is much greater. For example, a vice president of Patient Care Service in hospital may be in charge of several different functional areas, such as nursing, diagnostic imaging services, and laboratory services; in contrast, a director of Medical Records a lower-level position has responsibility only for the function of patient medical records. Furthermore, a supervisor within the Environmental Services department may have responsibility for only a small housekeeping staff, whose work is crucial, but confined to a defined area of the organization. The size and complexity of the specific health services organization will dictate the particular structure. For example, larger organizations such as a large community hospitals, hospital systems, and academic medical canters will likely have deep vertical structures reflecting varying levels of administrative control for the organization. This structure is necessary due to the large choice of services provided and the corresponding vast set of administrative and support services that are needed to assist the delivery of clinical services. Other characteristics associated with this functional structure include a strict chain of command and line of reporting, which ensures that communication and assignment and evaluation of tasks are carried out in a linear command and control (Thompson,2007a).A career in nursingcould start at band 2 as a clinical support worker rising to nurse consultant at a band 8.As a qualified nurse, would progress start a career at band 5. Examples of other roles, with typical Agenda for Change pay bands include: health visitor (band 6), nurse team leader (band 6), nurse advanced (band 7), a modern matron (band 8a), nurse consultant (band 8a-c). The Allied Health Professional diagram below demonstrates the level of bands with NSH. There are several strategies used by managers to create and maintain excellent performances. These include formal methods such as offering training programs, assisting with leadership, providing continuing education, especially, for clinical and technical fields, and providing job enrichment. . . http://www.skillsforhealth.org.uk/career-framework/?sec=cf Importance of Roles and Responsibilities of Hierarchy Hierarchy is very important in health and social care in terms of roles and responsabilities, to sustain success, because designed to benefit the company and the employers of maintaining managerial integrity. Accountability is one of the fundamental issues to sustain success achieving goals (Barr and Dowding 2012). Those at the top of the hierarchy have more authority than those lower down. The organizational structure is designed to deliver its business, assign work task, monitoring and review of individual performance and to ensure excellent delivery of service. The role is fulfilled sensitively and skilfully by the managers, it can create a strong sense of security and a feeling that there is a reliable safety net if things should start to go wrong. The senior manager in the care home is all health care environment, be it a traditional setting, a home health facility or even hospice care, and have a hierarchy of health care professionals. Hierarchy roles involve leading, controlli ng and organising other various functions within the health care system. The role and responsibility of the hierarchy is to ensure that tasks are being done exactly and correctly and priorities workload within the team. The Hierarchy has responsibilities to encourage staff to perform well as management team will be accountable if anything goes wrong. Tasks are carried out in the best way possible to achieve goals and that appropriate resources inclining financial and human resources, are adequate to support the organization. There are other role involve example recruitment and development of staff, acquisition of technology, services additions, and allocation and spending of financial resources. (Boblitzand Thompson, 2005). Managers are responsibly to ensure the patient receives the most appropriate firmly and effective services possible and assesses achievement of performance target that are desirable for the hierarchy. Conclusion In conclusion health and social care gives the opportunities to embrace different careers doing to the extent of occupations. With Allied Professional when starts with band 1 there are opportunities that take employers to the top level and employees can became example: Nurses or social workers, because the training employers provides can take to a high education. Employers can provide employees with training and a good employability skill. References Bach,S. and Grant, A.(2009) Communicating and Interpersonal Skills for Nurses.(Transforming Nursing Practice) Exeter: Learning Matters. Barr,J. and Dowding ,L.(2012) Leadership in Health Care 2nd edn SAGE Publication Benbassat, J., Taragin, M. (1998). What is adequate health care and how can quality of care be improved? International Journal of Health Care Quality Assurance, 11(2), 58-64. Brotherton, G.and Parker, S. (2011) Your Foundation in Health and Social Care. London: Sage Publications Career Frameworks, (2014) .Career Framework Interactive Resource Administration, business support and management of health services. Available from: http://www.skillsforhealth.org.uk/career-framework/?sec=cfid=3 [Accessed 29/11/2014] Department of Health Professions (2009) Confidentiality NHS Code of Practice London, DOH Health and Safety Executive (1974) Health and Safety in the Workplace Act 1974 www.hse.gov.uk accessed 31/10/14 Magee, J.C., and Galinsky, A.D. (2008).Academy of Management 104 (4), 590-609 NMC (2004) Code of Professional Conduct Standards for Conduct Performance and Ethics. London, Nursing Midwifery Council. NMC. (2009) The Code: Standards of Conduct, Nursing and Midwifery Council Tilley, S and Watson R. (2004), Accountability in nursing and midwifery 2nd ed. Blackwell Publishing Oxford Prospect, (2014).Social worker: Job description | Prospects.ac.uk. Available from: http://www.prospects.ac.uk/social_worker_job_description.htm [Accessed 29/11/2014] Ronay, R., Greenaway, K.,Anicich, E,M., and Galinsky,A. D. (2012). Seeking Structure in Social Organization: 106 (4), 509-609. Smith, J. (2000) Health Management Information Systems: Library of Congress: Open University Press: Buckingham Sullivan, E, and Decker, P. (2005) Effective Leadership and Management in Nursing; 8th edn Pearson/Prentice Hall Taylor,G. and Thornton ,C.(1995) Managing People Directory of Social Change :Radius works. London. NHS Careers (2014). Available from: http://www.nhscareers.nhs.uk/ [Accessed 31/10/2014] Health and Social Care Act 2012. Available from: http://www.legislation.gov.uk/ukpga/2012/7/enacted [Accessed 29/11/2014] NHS, (2014).Careers in the allied health professions -. Available from: http://www.nhscareers.nhs.uk/explore-by-career/allied-health-professions/careers-in-the-allied-health-professions/ [Accessed 31/10/2014] NHS, (2014).Social worker Available from: http://www.nhscareers.nhs.uk/explore-by-career/wider-healthcare-team/careers-in-the-wider-healthcare-team/clinical-support-staff/social-worker/ [Accessed 29/11/2014]

Little Women: a Look Into Gender Roles in 1941 Essay

A look into gender roles in 1941 The photograph â€Å"Little Girls with Their Dolls and Buggies† (1941), taken by Russell Lee, is of two young girls pushing baby dolls in carriages along a sidewalk in Caldwell, Idaho. It’s a bright, sunny day and the girls are walking alone, with no other people visible in the photograph. Both girls are smiling, and the girl pictured to the right is looking intently at the girl to the left. Behind the girls to the left we see a respectably sized house, and well maintained lawn. Behind them, the sidewalk endlessly continues to trees in the background. To the right of the picture there is a road which contains no cars. It appears to be in a middle to upper class, suburban neighborhood. They appear to be approximately the same age and are similarly dressed. It is an intriguing image that demonstrates traditionally accepted feminine gender roles during the mid 20th century. Gender roles can typically be defined as the behaviors and attitudes expected of male and female members of a society by that society. In 1941, women were typically expected to stay home and raise a family. They were also supposed to be social and they were Judged quite often on their appearance. These expectations of women were pushed upon them at a young age, as shown through the photograph. The girls appear to be about seven years old and they are already pushing around baby dolls and exploring their maternal roles. How identical the girls look is also a very revealing. The girls don’t look to be related, but yet they appear as mirror images of one another. They both have short, groomed hair, pulled away from their face. They are both wearing dresses, and are pushing ractically identical carriages. They are shaped to look â€Å"how a woman should† and follow the same expected role of women during that time period. I think it’s also important to note the variety of social influences of gender roles. Influence and reinforcement of gender roles often comes from the toys children play with. Dolls are traditionally a toy for girls. Dolls tend to represent feminine traits and help to prepare young girls for the task of motherhood. Children tend to get most of their toys from a parent or family member, who often has the strongest influences on a erson’s gender role. The young girls clothing also comes from their parents. This is yet another example of how their parents reinforce their perceived gender roles. Peers also play a role in shaping one’s anticipated gender role. During this time especially, peers responded more and got along better with children who fit traditional gender roles. This again leads back to how similarly the girls are dressed in the photograph and the similar toys theyre playing with. The girls are being conditioned to follow society and their peers assumed ideas of the roles they are expected to play. The girls are also walking alone; their parents are not in visible in the photograph. It’s like their parents are trying to let them be â€Å"little adults†. They’re preparing their children for their expected future of raising a family. Imposed gender roles are often hard to escape. Especially during the 1940’s, women had very specific assumed roles. While looking at Russell’s photo, you may see two young girls, message about traditional gender roles. It’s a shame that these girls, at such a young age, were being shaped to a very limited role that society has deemed to be their future.

Morality Play Essay

In life people strive consistently to choose between what is right and wrong. Most never take time to critically evaluate what factors drive their moral compass. Most have never taken the time to understand the conflicts that arise within their moral decisions. Analysis of the philosophical quiz â€Å"Are you a moral realist? † results gave me the opportunity to scrutinize my own moral compass. To follow I will discuss my opinion on the results of the quiz and the impact it had on my foundation of morality. I agree completely with the analysis. Upon completion of the quiz I learned that I was a moral objectivist and a moral relativist. Questions number two and eight provided me with the most glaring obvious evidence of my moral inconsistency. I felt very strongly that what is right or wrong depends on individual viewpoints and society supports this statement. When the Supreme Court is hearing case a group of justices vote on what is right. They don’t always the same opinion but the perception of what is being told is what makes a law and dictates what is right. Question number eight is in direct conflict because in no uncertain terms I believe it is wrong no matter whom you are, where you are, to torture innocent babies just for fun. My strong feelings in that regards completely nullifies right and wrong being based on individual viewpoints. The quiz result stating my position is inconsistent is correct. I was surprised by the results of the quiz; it opened my eyes to the truth of my ethical principles. I understand now that morality is something that I have failed to evaluate. The truth that I have discovered of my morality is that it is in conflict. This conflict exists because I have been guided by outside factors in my views of what is ethical. For example, politics tells me that freedom of religion is a right protected in the constitution so in my mind it became wrong to challenge someone’s religious views no matter what their views made them do. Being that I rationalized it is not justifiable to challenge someone religious views then a woman put to death in another country in the name of religion is not wrong due to the religions moral authority. I can say I have indeed fell victim to the distinguishing between descriptive ethics and normative ethics. Individuals have a diverse array of moral beliefs, which vary from person to person and culture to culture. To say this is to simply describe what is the case (Chaffe pg. 225). I have come to realize a person being killed in the name of religion is something that happens but it doesn’t mean that it is something that should happen. One could say my moral compass pointed north on some occasions and south on others. I see clearly that in every circumstance when a question was asked I thought how it applied to me. In truth my ethical judgment comes from a selfish place. In each scenario my determination was made by looking at what is appropriate for me and secondly society as a whole. I think the inconsistency in my morally can be attributed to two facts. The first is what is good for me always comes first and that I am torn between allowing descriptive and normative ethics govern my decisions. With morality there is what is and what should be, and with my own personal morality the same applies. My personal conflicts ethically stem from failure to consciously asses my moral compass. Morality is much more than someone’s beliefs governing their actions, it’s about an acceptance of what is right and wrong universally no matter a person’s culture, religion, or background. By assessment of my moral compass I have uncovered that I must take a closer look at what should be and stop being guided by what is. Bibliography Chaffee, J. (2011). The philosopher’s way: thinking critically about profound ideas (4th ed. ). Boston, MA: Prentice Hall.